<div>
  <button atButton [atType]="'error'" (click)="show('error')">error</button>
  <button atButton [atType]="'warning'" (click)="show('warning')">warning</button>
  <button atButton [atType]="'success'" (click)="show('success')">success</button>
  <button atButton [atType]="'info'" (click)="show('info')">info</button>
</div>
